diff --git a/pkgs/development/python-modules/blivet/default.nix b/pkgs/development/python-modules/blivet/default.nix
index 93dbb8634f6..f84c836c056 100644
--- a/pkgs/development/python-modules/blivet/default.nix
+++ b/pkgs/development/python-modules/blivet/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchFromGitHub, buildPythonPackage, pykickstart, pyparted, pyblock
-, pyudev, six, libselinux, cryptsetup, multipath_tools, lsof, utillinux, isPy3k
+, pyudev, six, libselinux, cryptsetup, multipath_tools, lsof, utillinux
 }:
 
 let
@@ -9,7 +9,6 @@ let
 in buildPythonPackage rec {
   name = "blivet-${version}";
   version = "0.67";
-  disabled = isPy3k;            # for urlgrabber
 
   src = fetchFromGitHub {
     owner = "dwlehman";
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index f869763b51d..450e66181f1 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -274,7 +274,6 @@ let
 
   almir = buildPythonPackage rec {
     name = "almir-0.1.8";
-    disabled = isPy3k;          # for beaker
 
     src = pkgs.fetchurl {
       url = "http://pypi.python.org/packages/source/a/almir/${name}.zip";
@@ -1340,7 +1339,6 @@ let
   zc_recipe_egg_fun = { buildout, version, md5 }: buildPythonPackage rec {
     inherit version;
     name = "zc.recipe.egg-${version}";
-    disabled = isPy3k;
 
     buildInputs = with self; [ buildout ];
     doCheck = false;
@@ -2300,7 +2298,6 @@ let
 
   discogs_client = buildPythonPackage rec {
     name = "discogs-client-2.0.2";
-    disabled = isPy3k;          # for oauth2
 
     src = pkgs.fetchurl {
       url = "https://pypi.python.org/packages/source/d/discogs-client/${name}.tar.gz";
@@ -2388,7 +2385,7 @@ let
 
   docker_registry = buildPythonPackage rec {
     name = "docker-registry-0.9.0";
-    disabled = isPy3k || isPyPy;  # for gevent
+    disabled = isPy3k;
 
     src = pkgs.fetchurl {
       url = "https://pypi.python.org/packages/source/d/docker-registry/${name}.tar.gz";
@@ -3193,7 +3190,6 @@ let
 
   pyramid_beaker = buildPythonPackage rec {
     name = "pyramid_beaker-0.7";
-    disabled = isPy3k;          # for beaker
 
     src = pkgs.fetchurl {
       url = "http://pypi.python.org/packages/source/p/pyramid_beaker/${name}.tar.gz";
@@ -3761,7 +3757,6 @@ let
 
   deluge = buildPythonPackage rec {
     name = "deluge-1.3.11";
-    disabled = isPy3k;          # for gygtk
 
     src = pkgs.fetchurl {
       url = "http://download.deluge-torrent.org/source/${name}.tar.bz2";
@@ -4720,7 +4715,6 @@ let
   geventhttpclient = buildPythonPackage rec {
     name = "geventhttpclient-${version}";
     version = "1.1.0";
-    disabled = isPy3k || isPyPy;  # for gevent
 
     src = pkgs.fetchurl {
       url = "https://pypi.python.org/packages/source/g/geventhttpclient/${name}.tar.gz";
@@ -4739,7 +4733,7 @@ let
 
   gevent-socketio = buildPythonPackage rec {
     name = "gevent-socketio-0.3.6";
-    disabled = isPy3k || isPyPy;  # for gevent
+    disabled = isPy3k || isPyPy;  # see https://github.com/surfly/gevent/issues/248
 
     src = pkgs.fetchurl {
       url = "https://pypi.python.org/packages/source/g/gevent-socketio/${name}.tar.gz";
@@ -4753,7 +4747,7 @@ let
 
   gevent-websocket = buildPythonPackage rec {
     name = "gevent-websocket-0.9.3";
-    disabled = isPy3k || isPyPy;  # for gevent
+    disabled = isPy3k || isPyPy;  # see https://github.com/surfly/gevent/issues/248
 
     src = pkgs.fetchurl {
       url = "https://pypi.python.org/packages/source/g/gevent-websocket/${name}.tar.gz";
@@ -4797,7 +4791,7 @@ let
 
   gipc = buildPythonPackage rec {
     name = "gipc-0.5.0";
-    disabled = isPy3k || isPyPy;  # for gevent
+    disabled = !isPy26 && !isPy27;
 
     src = pkgs.fetchurl {
       url = "http://pypi.python.org/packages/source/g/gipc/${name}.zip";
@@ -5597,7 +5591,6 @@ let
 
   locustio = buildPythonPackage rec {
     name = "locustio-0.7.2";
-    disabled = isPy3k || isPyPy;  # for gevent
 
     src = pkgs.fetchurl {
       url = "https://pypi.python.org/packages/source/l/locustio/${name}.tar.gz";
@@ -8292,7 +8285,6 @@ let
   pykickstart = buildPythonPackage rec {
     name = "pykickstart-${version}";
     version = "1.99.39";
-    disabled = isPy3k;
 
     src = pkgs.fetchurl rec {
       url = "http://pkgs.fedoraproject.org/repo/pkgs/pykickstart/"
@@ -10986,7 +10978,6 @@ let
 
   turses = buildPythonPackage (rec {
     name = "turses-0.2.22";
-    disabled = isPy3k;          # for oauth2
 
     src = pkgs.fetchurl {
       url = "http://pypi.python.org/packages/source/t/turses/${name}.tar.gz";
@@ -13086,7 +13077,6 @@ let
   searx = buildPythonPackage rec {
     name = "searx-${rev}";
     rev = "44d3af9fb2482cd0df1a8ababbe2fdf27ab33172";
-    disabled = isPy3k || isPyPy;  # for gevent
 
     src = pkgs.fetchgit {
       url = "git://github.com/asciimoo/searx";
@@ -13108,7 +13098,6 @@ let
 
   grequests = buildPythonPackage rec {
     name = "grequests-0.2.0";
-    disabled = isPy3k || isPyPy;  # for gevent
 
     src = pkgs.fetchurl {
       url = "http://pypi.python.org/packages/source/g/grequests/${name}.tar.gz";